Akhter, N., F. Rahman, M. Salman, K. Anam, S. Banerjee, S. Amin, S. Jahan, Z. Hasen, M. Rahman, M. Uddin, M. Rashid, M. Hafiz, and M. Khalil. “Outcome of Pregnancy in Patients With Congenital Heart Diseases”. Mymensingh Medical Journal, vol. 20, no. 4, Oct. 2012, pp. 620-4, https://banglajol.info/index.php/MMJ/article/view/12403.